Use shift and add instead of mul on ARM for integer hash.

src/arm/macro-assembler-arm.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1438 matching lines @@
   // hash = ~hash + (hash << 15);
   mvn(t1, Operand(t0));
   add(t0, t1, Operand(t0, LSL, 15));
   // hash = hash ^ (hash >> 12);
   eor(t0, t0, Operand(t0, LSR, 12));
   // hash = hash + (hash << 2);
   add(t0, t0, Operand(t0, LSL, 2));
   // hash = hash ^ (hash >> 4);
   eor(t0, t0, Operand(t0, LSR, 4));
   // hash = hash * 2057;
-  mov(t1, Operand(2057));
-  mul(t0, t0, t1);
+  mov(t1, Operand(t0, LSL, 11));
+  add(t0, t0, Operand(t0, LSL, 3));
+  add(t0, t0, t1);
   // hash = hash ^ (hash >> 16);
   eor(t0, t0, Operand(t0, LSR, 16));
 
   // Compute the capacity mask.
   ldr(t1, FieldMemOperand(elements, NumberDictionary::kCapacityOffset));
   mov(t1, Operand(t1, ASR, kSmiTagSize));  // convert smi to int
   sub(t1, t1, Operand(1));
 
   // Generate an unrolled loop that performs a few probes before giving up.
   static const int kProbes = 4;
@@ skipping 2154 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM